BR9815758A - Mri system with peripheral access and non-homogeneous field - Google Patents

Mri system with peripheral access and non-homogeneous field

Info

Publication number
BR9815758A
BR9815758A BR9815758-2A BR9815758A BR9815758A BR 9815758 A BR9815758 A BR 9815758A BR 9815758 A BR9815758 A BR 9815758A BR 9815758 A BR9815758 A BR 9815758A
Authority
BR
Brazil
Prior art keywords
magnetic field
pole face
magnets
access
base
Prior art date
Application number
BR9815758-2A
Other languages
Portuguese (pt)
Inventor
Freeman H Rose Jr
Wayne Cornelius
Christopher W Crowley
Original Assignee
Panacea Medical Lab
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Panacea Medical Lab filed Critical Panacea Medical Lab
Publication of BR9815758A publication Critical patent/BR9815758A/en

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R33/00—Arrangements or instruments for measuring magnetic variables
    • G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
    • G01R33/28—Details of apparatus provided for in groups G01R33/44 - G01R33/64
    • G01R33/38—Systems for generation, homogenisation or stabilisation of the main or gradient magnetic field
    • G01R33/383—Systems for generation, homogenisation or stabilisation of the main or gradient magnetic field using permanent magnets
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R33/00—Arrangements or instruments for measuring magnetic variables
    • G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
    • G01R33/28—Details of apparatus provided for in groups G01R33/44 - G01R33/64
    • G01R33/38—Systems for generation, homogenisation or stabilisation of the main or gradient magnetic field
    • G01R33/3806—Open magnet assemblies for improved access to the sample, e.g. C-type or U-type magnets

Landscapes

  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)

Abstract

"SISTEMA DE MRI COM ACESSO PERIFéRICO E CAMPO NãO HOMOGêNEO" Um aparelho de MRI para a formação de imagem de um objeto inclui uma base, um par de ímãs, e uma unidade de transdutor. Os ímãs são montados na base com a face de polo Norte de um ímã voltada para a face de polo Sul do outro ímã. A face de polo Norte e a face de polo Sul são cada uma substancialmente arqueadas, e são posicionadas na base para estabelecer um campo magnético em uma região substancialmente em forma de U entre a face de polo Norte e a face de polo Sul. Importante, a formação de imagem é realizada em uma parte não homogênea desse campo magnético. Essa parte é caracterizada por superfícies substancialmente paralelas que possuem magnitudes de campo magnético constantes e mutuamente diferentes. Importante, o espaço entre os ímãs no topo da região em forma de U cria um acesso para dentro da região em forma de U. Para se criar a imagem de um objeto, o objeto é colocado através do acesso e dentro da parte do campo magnético que possui as superfícies de magnitude de campo magnético constante. A unidade de transdutor é então utilizada para irradiar seletivamente cada superfície no campo magnético com a radiação eletromagnética para criar a imagem do objeto sobre cada superfície."MRI SYSTEM WITH PERIPHERAL ACCESS AND NON-HOMOGENEOUS FIELD" An MRI device for imaging an object includes a base, a pair of magnets, and a transducer unit. The magnets are mounted on the base with the North pole face of one magnet facing the South pole face of the other magnet. The North Pole face and the South Pole face are each substantially arched, and are positioned at the base to establish a magnetic field in a substantially U-shaped region between the North Pole face and the South Pole face. Importantly, image formation takes place in an inhomogeneous part of this magnetic field. This part is characterized by substantially parallel surfaces that have constant and mutually different magnetic field magnitudes. Importantly, the space between the magnets at the top of the U-shaped region creates an access into the U-shaped region. To create the image of an object, the object is placed through the access and within the part of the magnetic field which has the surfaces of constant magnetic field magnitude. The transducer unit is then used to selectively irradiate each surface in the magnetic field with electromagnetic radiation to create the image of the object on each surface.

BR9815758-2A 1997-06-27 1998-06-26 Mri system with peripheral access and non-homogeneous field BR9815758A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US08/884,415 US5935065A (en) 1997-06-27 1997-06-27 MRI system with peripheral access and inhomogeneous field

Publications (1)

Publication Number Publication Date
BR9815758A true BR9815758A (en) 2000-11-28

Family

ID=25384580

Family Applications (1)

Application Number Title Priority Date Filing Date
BR9815758-2A BR9815758A (en) 1997-06-27 1998-06-26 Mri system with peripheral access and non-homogeneous field

Country Status (8)

Country Link
US (1) US5935065A (en)
EP (1) EP0887655B1 (en)
JP (1) JP4050828B2 (en)
AR (1) AR010921A1 (en)
AU (1) AU746820B2 (en)
BR (1) BR9815758A (en)
CA (1) CA2239803A1 (en)
DE (1) DE69822709T2 (en)

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US9713664B2 (en) 2013-03-15 2017-07-25 Fresenius Medical Care Holdings, Inc. Nuclear magnetic resonance module for a dialysis machine
US9597439B2 (en) 2013-03-15 2017-03-21 Fresenius Medical Care Holdings, Inc. Medical fluid sensing and concentration determination using radio frequency energy and a magnetic field
US9433718B2 (en) 2013-03-15 2016-09-06 Fresenius Medical Care Holdings, Inc. Medical fluid system including radio frequency (RF) device within a magnetic assembly, and fluid cartridge body with one of multiple passageways disposed within the RF device, and specially configured cartridge gap accepting a portion of said RF device
US9566377B2 (en) 2013-03-15 2017-02-14 Fresenius Medical Care Holdings, Inc. Medical fluid sensing and concentration determination in a fluid cartridge with multiple passageways, using a radio frequency device situated within a magnetic field
US10286135B2 (en) 2014-03-28 2019-05-14 Fresenius Medical Care Holdings, Inc. Measuring conductivity of a medical fluid
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Also Published As

Publication number Publication date
CA2239803A1 (en) 1998-12-27
DE69822709T2 (en) 2005-03-10
JPH1199139A (en) 1999-04-13
DE69822709D1 (en) 2004-05-06
US5935065A (en) 1999-08-10
EP0887655A3 (en) 2000-03-15
EP0887655A2 (en) 1998-12-30
AU7392498A (en) 1999-01-07
JP4050828B2 (en) 2008-02-20
AU746820B2 (en) 2002-05-02
AR010921A1 (en) 2000-07-12
EP0887655B1 (en) 2004-03-31

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Legal Events

Date Code Title Description
B07A Application suspended after technical examination (opinion) [chapter 7.1 patent gazette]
B09B Patent application refused [chapter 9.2 patent gazette]

Free format text: INDEFIRO O PEDIDO DE PATENTE COM BASE NO ART. 8O COMBINADO COM ART. 13O DA LPI.

B09B Patent application refused [chapter 9.2 patent gazette]

Free format text: MANTIDO O INDEFERIMENTO UMA VEZ QUE NAO FOI APRESENTADO RECURSO DENTRO DO PRAZO LEGAL.